The Book of Purification and its Sunnah
1/114. Chapter:
What was narrated of the prohibition for the one holding urine or stool from praying
Sunan Ibn Majah
حَدَّثَنَا مُحَمَّدُ بْنُ الصَّبَّاحِ، أَنْبَأَنَا سُفْيَانُ بْنُ عُيَيْنَةَ، عَنْ هِشَامِ بْنِ عُرْوَةَ، عَنْ أَبِيهِ، عَنْ عَبْدِ اللَّهِ بْنِ أَرْقَمَ، قَالَ قَالَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ " إِذَا أَرَادَ أَحَدُكُمُ الْغَائِطَ وَأُقِيمَتِ الصَّلاَةُ فَلْيَبْدَأْ بِهِ " .
It was narrated that 'Abdullah bin Arqam said: "The Messenger of Allah said: 'If anyone of you needs to defecate and the immediate call to prayer (Iqamah) is given, let him start with (relieving himself).'"
Reference : Sunan Ibn Majah 616In-book reference : Book 1, Hadith 350English translation : Vol. 1, Book 1, Hadith 616